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district heating network

Many property owners’ associations have obsolete diesel-fired thermal power generation plants. Such installations are fairly inefficient, generating a high level of contamination with no system in place to share out costs between neighbours. One such property owners’ association, comprising 11 blocks of dwellings situated in Mondragón (Guipúzcoa), will save over €500,000 by replacing diesel with biomass and has commissioned Grupo Aresol to undertake the installation of a district heating network that will supply hot water and heating to every home under the format of an energy services contract.

This property owners’ association of 82 dwellings used to have a diesel-fired boiler room that consumed 93,500 litres per year, and took the decision to go for renewable energy. This shift towards clean energy would also represent a significant economic saving for the property owners’ association. During the first year, it would save 14%, with an estimated 33% saving expected by the end of the energy services contract.

The new thermal installation consists of two Herz brand multifuel boilers. One is a Biomatic 500 model with a nominal capacity of 500 kW and the other is a Firematic 201 model with 201 kW of nominal
capacity. During the season both boilers run simultaneously, but during low consumption periods, only one is in operation. They are equipped with automatic ignition, continuous modulation burners and are equipped to adapt to the energy demand at all times in addition to guaranteeing a high level of efficiency and saving. Read more…

Article published in: FuturENERGY July-August 2016

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The village of El Atazar located in the mountains of Madrid, with 96 inhabitants, has provided the backdrop for the introduction of the first municipal district heating network powered by biomass in the Autonomous Community of Madrid. The network comprises two biomass boilers, two water tanks for energy accumulation and a primary pumping
system to supply the homes, in addition to control equipment, calorific energy meters and temperature measurement probes. It has taken more than 6 years to turn the first phase of the project into a reality, due to the studies that had to be undertaken, the permits, projects and funding requested by the town hall in question for its implementation.

The biomass-fuelled DHC network in El Atazar was undertaken by means of a public tender process to which various companies from different fields applied. Aplicaciones y Proyectos de Energía Solar S.L. (Aprosol S.L.) was the successful bidder for the execution and installation of the first phase of this innovative project.

This initial phase has included the thermal plant, the first phase of the distribution network and the first phase of connection to the houses. Two municipal buildings currently rented by the town council, the day centre for the elderly, two rural accommodation properties and the houses of the doctor and teacher form part of this initial phase of the network. The planning for subsequent phases includes extending the
network to other municipal buildings such as the medical centre and school.

Iñaki Íñiguez, Aprosol Director
Jorge Monasterio, Technical Dept. Desner Sistemas

Article published in: FuturENERGY March 2016